Report on the survey of cone and seed insects in conifer forest in Northeast China.
Sample cones were collected from 7 conifer species and identified as far as possible. Pinus koraiensis cones were attacked by Dioryctria abietella larvae, larvae of the Cecidomyiidae, Pityogenes chalcographus adults and larvae of the Lonchaeidae. Pinus sylvestris var. mongolica cones were found to be damaged by Dioryctria sp. Cecidomyiid larvae were found in Pinus thunbergii cones. Picea jezoensis cones were attacked by Cydia strobilella larvae and Megastigmus larvae. In Picea koraiensis [P. koyamai] cones were found: D. abietella larvae; cecidomyiid larvae; Lasiomma anthracinum [Strobilomyia anthracina] damage; C. strobilella larvae; Megastigmus larvae; and lonchaeid larvae. Abies nephrolepis cones contained L. abietis [S. abietis] damage, D. abietella larvae, 2 species of cecidomyiid larvae, Barbara sp. larvae and lonchaeid larvae. Larix gmelinii cones were attacked by Strobilomyia spp., L. laricicola [S. laricicola] and larvae of Retinia angustana, D. abietella, Eurytoma laricis and Cecidomyiidae. The percentage of larch cones damaged by each species is tabulated; it reaches 42-95% for Strobilomyia spp.